A Parameterized Surface Emission Model at L-Band for Soil Moisture Retrieval

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50615

Title:	A Parameterized Surface Emission Model at L-Band for Soil Moisture Retrieval
Authors:	Chen,L;Shi,JC;Wigneron,JP;Chen,KS
Contributors:	太空及遙測研究中心
Date:	2010
Issue Date:	2012-03-27 17:49:04 (UTC+8)
Publisher:	國立中央大學
Abstract:	The effects of soil surface roughness play a significant role in the microwave emission from the surface. Therefore, a good parameterization of the effects is a prerequisite for retrieving surface soil moisture information. With recent physical model developments, the advanced integral equation model (AIEM) has been proven to provide accurate representation over a wide range of surface-roughness conditions. We evaluated the capability of the AIEM model in simulating multiangular surface emission signals in comparison with a field experiment data set. A simplified multiangular surface emission model was developed based on simulated database using the AIEM model. Based on the parameterized model, an inversion procedure was developed using dual-polarization microwave brightness temperatures to retrieve soil moisture. Two data sets were used to test the inversion algorithm, and the accuracies in root-mean-square error were about 4% for incidence angles from 20 degrees to 50 degrees. This new simple model is suitable for soil moisture retrieval from future L-band satellite data.
Relation:	IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Appears in Collections:	[Center for Space and Remote Sensing Research ] journal & Dissertation

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